1 /*-
2 * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
3 * All rights reserved.
4 *
5 * This software was developed by Robert Watson for the TrustedBSD Project.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28 /*
29 * acl_get_fd - syscall wrapper for retrieving access ACL by fd
30 * acl_get_fd_np - syscall wrapper for retrieving ACL by fd (non-POSIX)
31 * acl_get_file - syscall wrapper for retrieving ACL by filename
32 * acl_get_link_np - syscall wrapper for retrieving ACL by filename (NOFOLLOW)
33 * (non-POSIX)
34 * acl_get_perm_np() checks if a permission is in the specified
35 * permset (non-POSIX)
36 * acl_get_permset() returns the permission set in the ACL entry
37 * acl_get_qualifier() retrieves the qualifier of the tag from the ACL entry
38 * acl_get_tag_type() returns the tag type for the ACL entry entry_d
39 */
40
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD: stable/9/lib/libc/posix1e/acl_get.c 208437 2010-05-23 08:12:36Z trasz $");
43
44 #include <sys/types.h>
45 #include "namespace.h"
46 #include <sys/acl.h>
47 #include "un-namespace.h"
48
49 #include <errno.h>
50 #include <stdio.h>
51 #include <stdlib.h>
52 #include <string.h>
53 #include <unistd.h>
54
55 #include "acl_support.h"
56
57 acl_t
acl_get_file(const char * path_p,acl_type_t type)58 acl_get_file(const char *path_p, acl_type_t type)
59 {
60 acl_t aclp;
61 int error;
62
63 aclp = acl_init(ACL_MAX_ENTRIES);
64 if (aclp == NULL)
65 return (NULL);
66
67 type = _acl_type_unold(type);
68 error = __acl_get_file(path_p, type, &aclp->ats_acl);
69 if (error) {
70 acl_free(aclp);
71 return (NULL);
72 }
73
74 aclp->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES;
75 _acl_brand_from_type(aclp, type);
76
77 return (aclp);
78 }
79
80 acl_t
acl_get_link_np(const char * path_p,acl_type_t type)81 acl_get_link_np(const char *path_p, acl_type_t type)
82 {
83 acl_t aclp;
84 int error;
85
86 aclp = acl_init(ACL_MAX_ENTRIES);
87 if (aclp == NULL)
88 return (NULL);
89
90 type = _acl_type_unold(type);
91 error = __acl_get_link(path_p, type, &aclp->ats_acl);
92 if (error) {
93 acl_free(aclp);
94 return (NULL);
95 }
96
97 aclp->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES;
98 _acl_brand_from_type(aclp, type);
99
100 return (aclp);
101 }
102
103 acl_t
acl_get_fd(int fd)104 acl_get_fd(int fd)
105 {
106 if (fpathconf(fd, _PC_ACL_NFS4) == 1)
107 return (acl_get_fd_np(fd, ACL_TYPE_NFS4));
108
109 return (acl_get_fd_np(fd, ACL_TYPE_ACCESS));
110 }
111
112 acl_t
acl_get_fd_np(int fd,acl_type_t type)113 acl_get_fd_np(int fd, acl_type_t type)
114 {
115 acl_t aclp;
116 int error;
117
118 aclp = acl_init(ACL_MAX_ENTRIES);
119 if (aclp == NULL)
120 return (NULL);
121
122 type = _acl_type_unold(type);
123 error = ___acl_get_fd(fd, type, &aclp->ats_acl);
124 if (error) {
125 acl_free(aclp);
126 return (NULL);
127 }
128
129 aclp->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES;
130 _acl_brand_from_type(aclp, type);
131
132 return (aclp);
133 }
134
135 /*
136 * acl_get_permset() (23.4.17): return via permset_p a descriptor to
137 * the permission set in the ACL entry entry_d.
138 */
139 int
acl_get_permset(acl_entry_t entry_d,acl_permset_t * permset_p)140 acl_get_permset(acl_entry_t entry_d, acl_permset_t *permset_p)
141 {
142
143 if (entry_d == NULL || permset_p == NULL) {
144 errno = EINVAL;
145 return (-1);
146 }
147
148 *permset_p = &entry_d->ae_perm;
149
150 return (0);
151 }
152
153 /*
154 * acl_get_qualifier() (23.4.18): retrieve the qualifier of the tag
155 * for the ACL entry entry_d.
156 */
157 void *
acl_get_qualifier(acl_entry_t entry_d)158 acl_get_qualifier(acl_entry_t entry_d)
159 {
160 uid_t *retval;
161
162 if (entry_d == NULL) {
163 errno = EINVAL;
164 return (NULL);
165 }
166
167 switch(entry_d->ae_tag) {
168 case ACL_USER:
169 case ACL_GROUP:
170 retval = malloc(sizeof(uid_t));
171 if (retval == NULL)
172 return (NULL);
173 *retval = entry_d->ae_id;
174 return (retval);
175 }
176
177 errno = EINVAL;
178 return (NULL);
179 }
180
181 /*
182 * acl_get_tag_type() (23.4.19): return the tag type for the ACL
183 * entry entry_p.
184 */
185 int
acl_get_tag_type(acl_entry_t entry_d,acl_tag_t * tag_type_p)186 acl_get_tag_type(acl_entry_t entry_d, acl_tag_t *tag_type_p)
187 {
188
189 if (entry_d == NULL || tag_type_p == NULL) {
190 errno = EINVAL;
191 return (-1);
192 }
193
194 *tag_type_p = entry_d->ae_tag;
195
196 return (0);
197 }
198
199 int
acl_get_entry_type_np(acl_entry_t entry_d,acl_entry_type_t * entry_type_p)200 acl_get_entry_type_np(acl_entry_t entry_d, acl_entry_type_t *entry_type_p)
201 {
202
203 if (entry_d == NULL || entry_type_p == NULL) {
204 errno = EINVAL;
205 return (-1);
206 }
207
208 if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) {
209 errno = EINVAL;
210 return (-1);
211 }
212
213 *entry_type_p = entry_d->ae_entry_type;
214
215 return (0);
216 }
217